Casio FX-991ES Support Question
Casio FX-991ES Support Question
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Question posted by rigs0ac2122 on November 1st, 2013
How To Reset Casio Calculator Fx-991es
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Related Casio FX-991ES Manual Pages
User Guide - Page 4
... Co., Ltd. Specify the angle unit in accordance with four arrows, indicating direction, as shown in this manual, it means you see "Using Calculator Memory". E-2 Moreover, CASIO Computer Co., Ltd. k Using the Separate Appendix
Whenever you should refer to the separate Appendix. Note that this is not part of the actual key...
User Guide - Page 5
... cause certain components to become shorted. Doing so can cause it will not get into the
calculator. • Use only the type of it by burning it into the hands of small ...of battery specified for later reference. Battery
• After removing the battery from the calculator, put it in
this calculator in a safe place where it to indicate information that can create the risk of ...
User Guide - Page 6
...Doing so can remove printed markings and can damage internal circuitry.
• Never drop the calculator or otherwise subject it might be splashed by water or exposed to large amounts of water... Precautions
• Be sure to press the O key before wiping the calculator. Also avoid leaving the calculator in areas subjected to large amounts of your trousers or other volatile agents ...
User Guide - Page 7
...and then affix the hard case to remove it probably means that battery power is on the calculator. • Press 1A(OFF) to adjust display contrast.
k Adjusting Display Contrast
1N(SETUP)c6...contrast adjustment screen. After the setting is the way you press N) is low. E-5 Before Using the Calculator
k Removing the Hard Case
Before using d and e while the mode menu (which appears when you...
User Guide - Page 8
... currently shows an intermediate result of significant digits is in effect.
The calculator is in effect. The calculator is in the CMPLX Mode. The default angle unit is selected as ... Math
$`
Disp
Means this indicator will be replayed, or there is in the MATRIX Mode. The calculator is standing by for input of decimal places is standing by for input of a variable name to ...
User Guide - Page 9
... menu has two screens, which you want to select. • To select the CMPLX Mode, for example, press 2. Calculation Modes and Calculator Setup
k Calculation Modes
When you can jump between using c and f. c
f
E-7 k Configuring the Calculator Setup
Pressing 1N(SETUP) displays the setup menu, which you want to perform this mode:
COMP CMPLX
STAT
BASE...
User Guide - Page 10
... format causes fractions and other expressions to be displayed in a single line. Calculation results are rounded off to the specified digit before being displayed. Example: 1...429 × 10-1 (Sci4) E-8 • See "Adjusting Display Contrast" for displayed calculation results.
Calculation results are rounded off to the specified digit before being displayed. Example: 100 ÷...
User Guide - Page 11
... exponential format.
• Norm: Selecting one of the STAT Mode STAT editor screen on or off. The decimal point for input values is applied for calculation results
. Norm1: 10-2 > x, x > 1010 Norm2: 10-9 > x, x > 1010
Example: 1 ÷ 200 = 5 × 10-3 (Norm1) 0.005 (Norm2)
Specifying the...
User Guide - Page 12
... the = key to execute it is automatically input with Parenthesis
When you input any of the functions shown below .
19(CLR)1(Setup)=(Yes)
This setting: Calculation Mode Input/Output Format Angle Unit Display Digits Fraction Display Format Complex Number Format Statistical Display Decimal Point
Is initialized to input the argument and...
User Guide - Page 13
... is different if you want to use the e key to scroll back. Final Closed Parenthesis You can omit the multiplication sign (×) in any of a calculation, immediately before the = key is pressed.
User Guide - Page 14
...when the overwrite mode is selected. • The initial default for more information. • The calculator automatically changes to the insert mode whenever you change to the overwrite mode when you need it....not switch to make room when you input replaces the character at a convenient point and
calculate the result. With the overwrite mode, any new character you input a new character. ...
User Guide - Page 15
... correct the expression 369 × × 12 so it becomes
369 × 12 LINE Insert Mode:
369**12
dd
Y Overwrite Mode:
369**12
ddd
Y
Correcting a Calculation Example: To correct cos(60) so it becomes sin(60) LINE Insert Mode:
c60)
dddY
s Overwrite Mode:
c60)
dddd
s Inserting Input into...
User Guide - Page 16
...
When inputting with the cursor positioned at the error location. The maximum allowable height of a calculation formula is causing the error.
d1
=
You can then make necessary corrections. If this happens, divide the calculation into multiple parts and calculate each part separately.
E-14 k Displaying the Location of an Error
If an error message...
User Guide - Page 17
... Fraction Mixed Fraction log(a,b) (Logarithm) 10^x (Power of 10) e^x (Power of e) Square Root Cube Root Square, Cube Reciprocal Power Power Root Integral Derivative Σ Calculation Absolute Value Parentheses
Key Operation ' 1'(() & 1l($) 1i(%) ! 1!(#) w, 1w(x3) E 6 16(") 7 17(F) 1&(8) 1w(Abs) ( or )
Bytes 9 13 6 4 4 4 9 4 5 4 9 8 6 8 4 1
Math Format Input Examples • The following...
User Guide - Page 18
...:
Function Key Operation Resulting Expression
Fraction
'
log(a,b) Power Root
& 16(")
E-16 Example 3: To input (1 + 2 )2 × 2 =
5
MATH
Math
(1+'2c5e)
w*2=
• When you press = and obtain a calculation result using Math format, you can be incorporated into the function specified here.
• If the cursor is incorporated into the function specified here. Incorporating a ...
User Guide - Page 19
... (no irrational number form) regardless of whether you can specify whether calculation results should be displayed in a form that Includes '2, π, etc... irrational number display) display conditions are the same as those for the input/output format, calculation results are always displayed using decimal values. Example 1: '2 +'8 = 3'2
MATH
Math
1
!2e+!8=
Math
2
!...
User Guide - Page 20
... up to both the real part and the imaginary part. CMPLX Mode polar coordinate display (r ∠ θ )
The following are the calculations for which ' form is also counted as a term). ' form calculation results use display formats like those shown
below.
± a'b , ± d ± a'b , ± a'b ± d'e cf
E-18 Angle Unit Setting Deg Rad...
User Guide - Page 21
...: '3 + '2 = 10'3 + 11'2
11 10
110
• The result is the least common multiple of c and f.
• Since calculation results are outside of the allowable range - More than two terms in the calculation result
• Calculation results displayed in ' form are reduced to a common denominator, they are displayed in the above examples indicate what...
User Guide - Page 22
... and Number of Significant Digits You can specify a fixed number of Display Digits". All calculations in this section are performed in decimal form.
Example: log3 + '2 = 1.891334817
Basic Calculations
(COMP)
This section explains how to perform arithmetic calculations.
k Arithmetic Calculations
Use the +, -, *, and / keys to perform arithmetic, fraction, percent, and sexagesimal...
User Guide - Page 26
... edit the expression you used for the new calculation.
When the calculation you turn off the calculator, press the O key, change to the calculation mode or the input/output format, or perform any reset operation.
• Calculation history memory is deleted automatically to make room for the previous calculation.
If you are cleared whenever you are performing...
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